6660377808 has 160 divisors (see below), whose sum is σ = 20074905600. Its totient is φ = 1863544320.

The previous prime is 6660377783. The next prime is 6660377813. The reversal of 6660377808 is 8087730666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4299018 + ... + 4300566.

It is an arithmetic number, because the mean of its divisors is an integer number (125468160).

Almost surely, 2^6660377808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6660377808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10037452800).

6660377808 is an abundant number, since it is smaller than the sum of its proper divisors (13414527792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6660377808 is a wasteful number, since it uses less digits than its factorization.

6660377808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825 (or 1819 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 51.

The square root of 6660377808 is about 81611.1377693021. The cubic root of 6660377808 is about 1881.4800673172.

The spelling of 6660377808 in words is "six billion, six hundred sixty million, three hundred seventy-seven thousand, eight hundred eight".